Magnetic interlocking repeater



Feb. 27, 1923.

C. J. ROGERS MAGNETIC INTERLOCKING REPEATIER Filed Sept. 27, 1919 2 sheets-sheet 1* w u a 9 mm I. 3 w W 0 2 1w! m. l 5 q 3 2 L 6 I? 2 wm 6 8 v ,4: m mwvfi 3 1 x mf l W fl I l@ II. 2 g 3 j r l L k a my 3 M 1 T m w mun/Ton larence Jffiogers.

WITNESSES gj'ykw Feb. 27, 1923. 1,446,770

C. J; ROGERS mans-r11: mi'anwcxmc RBPEATER Filed Sept. 27, 1919 2 aheets-lhut-z nrromvers Patented Feb. 27, 1923.

UNITED STATES PATENT OFFICE.

CLARENCE JOHN ROGERS, OF MORRIS, OKLAHOMA, ASSIGNOR TO GREAT WESTERN ELECTRIC COMPANY, OF MORRIS, OKLAHOMA, A CORPORATION OF OKLAHOMA.

MAGNETIC INT ERLOCKING REPEATER.

Application filed September 27. 1919. Serial No. 326,770.

To all whom it mag concern Be it known that I, CLARENCE JoHN Rocnns, a citizen of the United States, and a resident of Morris, in the county of Okmulgee and State of Oklahoma, have made certain new and useful Improvements in Magnetic Interlocking Repeaters, of which the following is a. specification.

My invention relates to improvements in telegrapl'i relays or repeaters, it being more particularly an improvement on the repeater described in my co-pending application filed July 16, 1919, Serial No. 311,381, audit con- SlStSlll the construct-ions, combinations and arrangements herein described and claimed.

One of the principal objects of my invention is to provide a repeater wherein the contlnulty of the transmitting circuit connections is preserved after the termination of an electrical impulse in the transmitting circuit, by means of mechanical action, and not by means of a holding coil other equivalent electrical means.

A further object of the invention is to provide means in a telegraph repeater for alternately bringing mechanical and electrical means into operation for maintaining the continuity of the transmitting circuit, regardless of whether the impulses are terminated or not.

A further object of the invention is to provide an interlocking repeater wherein one of the two interlocking armatures is opened after the cessation of an electrical impulse in the transmitting circuit, by magnetic action, in addition to the usual spring action.

A further object of the invention is to provide means in an interlockingrepeater,

whereby the two interlockingarmatures are actuated or attracted by virtue of the transmitting current, simultaneously.

Other objects and advantages will appear improved means for adjusting the spring tension.

In carrying out my invention I provide a pair of electro-magnets 1, and 2, disposed at right angles to each other, and each be ing provided with double windings or coils 3, 4 and 5, 6 respectively. The adjacent ends of the cores 7, 8 of the respective electromagnets, are of like polarity, as indicated by the signs, this being obtained by properly winding the various coils.

A wire 9 from the west line joins one end of the winding 4, a wire 10 from the other end of that winding, joining one end of the winding 6, from the other end of which a wire 11 runs to the contact 12 adja centto the positive end of the electromagnet 1. Similarly, awire 13 from the east line, joins one end of the winding 5, the other end being connected through a wire 14 to one end of the winding 3, from the other end of which a wire 15 runs to the contact 16 adjacent to the positive end of the electromagnet 2.

Pivoted at 1'7 and 18 respectively, are armatures 19 and 20 which are actuated in one direction by the influence of the respective electro-magn'ets 1 and 2, against the tension of springs 21 and 22 which tend to normally draw them away. lVhen thus drawn away, the respective armatures engage adjustable stops 23 and 24.

Each armature carries an insulating piece 25 beyond the pivotal point, to which pieces resilient contactors 26 and 27 are respectively aflixed, Each armature respectively carries a contact 28, 29 which is insulated from the armature at 30, 31. These contacts respectively join the wires 10 and 14 through connections 32 and 38. The contactors 26 and 27 respectively join the wires 15 and 11 through connections 3 1 and 35, while the contacts 36 and 37 which are engaged by the cont-actors 26, 27, are grounded through the 3 wires 38, 39..

Affixed to the end of each of the annatures 19, 20, is a strip of diamagnetic material 40. This material may be such as brass, and is provided for the purpose of'preventingthejends ofthe armatures from sticking when they come in contact as in Figure 2.

The modification in Figure 3 comprises a novelform of contact breaker which can 20 in subbe applied to the armatures v19 d contactors stitution of the fixedly carrie 26, 27. The improved contact breaker 10 is pivoted at 11 to a suitably inserted insulating mounting 4-2 in the armature 19 As in Figures 1 and 2, the armature 19 is pivoted at 17 and has the adjustable back stops 23*. It also carries the contacts 28, insulated at 13, and arranged to engage the fixed contact 12. The diamagnetic end 10 keeps the armature 19 "from sticking when in engagement with a cooperating armature.

Instead of fixedly securing the spring 21 to the armature 19, as is the case in Figure 1, one end of this spring is introduced in a slotted opening. 43 in the armature, that end being provided with a hook 4 1 which is adjustably seated in any one of the serrations 15 of the circuit breaker 40. Additional adjustment of tension of the spring 21 is obtained by means 01' the screw 16 which has a lock nut 17 for holding the ad justment.

Wires 3 1 and 38, respectively join the posts 48 with a magnet winding similar to the winding 3 in Figure 1, and the back stop 36 to ground. Abutments 19, 50, respectively on the armature 19 and the circuit breaker 4E0, engage in the act of breaking a part of the circuit between the member 40 and the contact points of the back stop 36 1 This peculiar type of adjustable spring makes it possible to secure widely varying spring tensions on the armature l9 without ruining the tension springs. The expedient of using rubber bands is resorted to by telegraph operators when they desire to get a very delicate spring adjustment oi their relays on bad telegraph lines. This particular spring adjustment makes such an expedient unnecessary, because by adjusting the spring hook 4% down close to the armature pivot 17, a very weak adjustment can be secured.

The operation.

The electro-magnet 1 and its associated parts, controls the east line 13, while the electro-magnet 2 with its associated parts controls the west line 9. As in my co-pending application, referred to, the purpose of the arrangement shown is to preserve the continuity of the circuit represented by either line regardless of whether signals are coming in over the line or going out. This mode of operation presently becomes more evident.

Let us assume that the west line has been opened, leaving the armatures 19 and 20 in the positions in Figure 2. A signal now comes in over the west line, energizing the winding 4 of the electro-magnet 1, and the winding 6 of the electro-magnet 2, thus at- ;tracting both armatures, in this manner:

Current flows from the west line over the wire 9, through the winding 1, over the wire 10 to the winding 6, over the wire to the contactor or circuit breaker 27, througli contact 87 to ground via the wire Both electro-magnets are thus energized and the armatures 19 and 20 are attracted, thereby assuming the positions in Figure l.

The energization of the winding 6 of the electro-magnet 2 is but momentary, because as soon as the armature 19 is attracted by virtue of the energization of the electromagnet 1, the contacts 12, 28 are brought into engagement, thus completing a path around the winding 6 thus: "from the west line over the wire 9, through winding over wire 10, over wire 32 to the'oontact 28, from contact 28 to contact 12, over wires 11, through the contactor 27, contact 37 and wire to ground. The armature 19 thus shuts ff or shunts the winding 6. Similarly, the armature 20 has the same shunting effect on the winding 3 of the electromagnet 1. These windings 3 and 6 may therefore be termed shunt coils.

So far it can be readily understood that when the parts are in the original position as in Figure 2, the armature 20, which preserves the west line circuit in the instrument, is mechanically held closed by the interlocking engagement of the armature 19. Then when the first electrical impulse comes over the west line as described, the momentary energization of the shunt winding 6 holds the armature 20 in the closed position by virtue of the magnetic attraction thereof.

As soon as the armature 19 is attracted, as described, the east line circuit is completed through the instrument over the following path: from the east line over wire 13, winding 5, wire 14:, wire 33, closed contacts 29, 16, wires 15 and. 3 1 to the contactor 26, contact 36 and ver wire 38 to ground. It is thus seen that the coil 3 of the electromagnet 1 is shut out or shunted around.

Now as to the continuity of the west line circuit, which is now the active line, assume that the circuit is broken as in the transmission of the signal. The armature 19 flies back against the stop 23 by virtue of the spring 21 and partly by virtue of the magnetized tip of the armature 20. It is easily seen that when the electro-magnets 1 and 2 are energized, the tips of the armatures 19 and 20 will be of like polarity as the adjacent ends oi the respective cores. There fore, when the armatures are in the position in Figure 1, they tend to repel each other to the closed positions.

But when the west line 9 is opened, as just referred to, the armature 19 loses its magnetism and is therefore attracted by the positively magnetized tip of the armature 20. Of course as soon as the armature 19 moves under the tip of the armature 20, that armature is mechanically locked against opening movement and so even though the east line circuit is now opened by virtue of the separation of the contacts 12, 28 and 26, 36, the armature 20 is still held in posi tion to keep the west line circuit closed. An ensuing energization of the circuit thus remaining closed, results in the repetition of the cycle of operations already described.

It is unnecessary to describe the action when signals come in over the east line, because in such event, precisely the same operations take place. While the construction and arrangement of the improved telegraph relay or repeater is that of a generally preferred form, obviously modifications and changes may be made without departing from the spirit of the invention or the scope of the claims.

I claim 1 A telegraph repeater, comprising first and second normally deenergized dualwound electro-magnets, each having an armature, onebeing held to close a circuit by the interlocking engagement of the other which controls separate circuits through the. windings of the first electromagnct; single windings of the first and second electro-magnet being simultaneously energized respectively to momentarily hold the armature of the first magnet while the armature of the second magnet is attracted from engagement at which time the momentary circuit is broken by said armature, and the second circuit is completed through the second winding of the first elec tro-magnet to hold the first armature until the second returns. I

2. In a telegraph repeater, a pivoted armature with an insulating insert, a circuit breaker pivoted on the insert, with a plurality of depressions; an adjustable back stop for the circuit breaker, abutments respectively on the circuit breaker and armature, and an adjustable spring with a hook selectively engageable with said depressions for regulation of armature action.

3. A telegraph repeater, comprising first and second electro-magents, each embraced by a line circuit; armatures for the magnets, each attracted upon energization of the magnets by an impulse over the line in one direction; and a pair of contacts in connection with the line, associated with the armature of the first magnet and closed upon attraction thereof, to shunt the second magnet and temporarily deenergize it.

4. A telegraph repeater, comprising first and second dual-wound magnets, embraced by a line circuit, armatures for the magnets, respectively attracted by an impulse in one direction over the line and the energization of one winding of the first magnet and the second winding of the second magnet; and a pair of contacts in connection with the line, associated with the armature of the first magnet and closed upon attraction thereof, to shunt the second winding of the second magnet and energize the first winding thereof toestablish a more permanent attraction of the second armature.

5. A telegraph repeater, comprising first and second electro-magnets, at right angles, each having an armature, the two being at right angles with tips adjoining, each acquiring like polarity for repulsion to closed positions, when both magnets are energized; and a back stop and spring for each armature, the later being assisted in withdrawing the armature upon deenergization of the first magnet by the magnetization of the armature of the second and energized magnet.

CLARENCE JOHN ROGERS. 

